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<title>Closure Unit Tests - goog.vec.Vec3</title>
<script src="../base.js"></script>
<script>
  goog.require('goog.vec.Float32Array');
  goog.require('goog.vec.Vec3');
  goog.require('goog.testing.jsunit');
</script>
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<body>
<script>

  function testDeprecatedConstructor() {
    var v = goog.vec.Vec3.create();
    assertElementsEquals(0, v[0]);
    assertEquals(0, v[1]);
    assertEquals(0, v[2]);

    assertElementsEquals([0, 0, 0], goog.vec.Vec3.create());

    assertElementsEquals([1, 2, 3], goog.vec.Vec3.createFromValues(1, 2, 3));

    assertElementsEquals([1, 2, 3], goog.vec.Vec3.createFromArray([1, 2, 3]));

    v = goog.vec.Vec3.createFromValues(1, 2, 3);
    assertElementsEquals([1, 2, 3], goog.vec.Vec3.clone(v));
  }

  function testConstructor() {
    var v = goog.vec.Vec3.createFloat32();
    assertElementsEquals(0, v[0]);
    assertEquals(0, v[1]);
    assertEquals(0, v[2]);

    assertElementsEquals([0, 0, 0], goog.vec.Vec3.createFloat32());

    goog.vec.Vec3.setFromValues(v, 1, 2, 3);
    assertElementsEquals([1, 2, 3], v);

    var w = goog.vec.Vec3.createFloat64();
    assertElementsEquals(0, w[0]);
    assertEquals(0, w[1]);
    assertEquals(0, w[2]);

    assertElementsEquals([0, 0, 0], goog.vec.Vec3.createFloat64());

    goog.vec.Vec3.setFromValues(w, 1, 2, 3);
    assertElementsEquals([1, 2, 3], w);
  }


  function testSet() {
    var v = goog.vec.Vec3.createFloat32();
    goog.vec.Vec3.setFromValues(v, 1, 2, 3);
    assertElementsEquals([1, 2, 3], v);

    goog.vec.Vec3.setFromArray(v, [4, 5, 6]);
    assertElementsEquals([4, 5, 6], v);

    var w = goog.vec.Vec3.createFloat32();
    goog.vec.Vec3.setFromValues(w, 1, 2, 3);
    assertElementsEquals([1, 2, 3], w);

    goog.vec.Vec3.setFromArray(w, [4, 5, 6]);
    assertElementsEquals([4, 5, 6], w);
  }

  function testAdd() {
    var v0 = goog.vec.Vec3.createFloat32FromArray([1, 2, 3]);
    var v1 = goog.vec.Vec3.createFloat32FromArray([4, 5, 6]);
    var v2 = goog.vec.Vec3.cloneFloat32(v0);

    goog.vec.Vec3.add(v2, v1, v2);
    assertElementsEquals([1, 2, 3], v0);
    assertElementsEquals([4, 5, 6], v1);
    assertElementsEquals([5, 7, 9], v2);

    goog.vec.Vec3.add(goog.vec.Vec3.add(v0, v1, v2), v0, v2);
    assertElementsEquals([6, 9, 12], v2);
  }

  function testSubtract() {
    var v0 = goog.vec.Vec3.createFloat32FromArray([1, 2, 3]);
    var v1 = goog.vec.Vec3.createFloat32FromArray([4, 5, 6]);
    var v2 = goog.vec.Vec3.cloneFloat32(v0);

    goog.vec.Vec3.subtract(v2, v1, v2);
    assertElementsEquals([1, 2, 3], v0);
    assertElementsEquals([4, 5, 6], v1);
    assertElementsEquals([-3, -3, -3], v2);

    goog.vec.Vec3.setFromValues(v2, 0, 0, 0);
    goog.vec.Vec3.subtract(v1, v0, v2);
    assertElementsEquals([3, 3, 3], v2);

    v2 = goog.vec.Vec3.cloneFloat32(v0);
    goog.vec.Vec3.subtract(v2, v1, v2);
    assertElementsEquals([-3, -3, -3], v2);

    goog.vec.Vec3.subtract(goog.vec.Vec3.subtract(v1, v0, v2), v0, v2);
    assertElementsEquals([2, 1, 0], v2);
  }

  function testNegate() {
    var v0 = goog.vec.Vec3.createFloat32FromArray([1, 2, 3]);
    var v1 = goog.vec.Vec3.createFloat32();

    goog.vec.Vec3.negate(v0, v1);
    assertElementsEquals([-1, -2, -3], v1);
    assertElementsEquals([1, 2, 3], v0);

    goog.vec.Vec3.negate(v0, v0);
    assertElementsEquals([-1, -2, -3], v0);
  }

  function testScale() {
    var v0 = goog.vec.Vec3.createFloat32FromArray([1, 2, 3]);
    var v1 = goog.vec.Vec3.createFloat32();

    goog.vec.Vec3.scale(v0, 4, v1);
    assertElementsEquals([4, 8, 12], v1);
    assertElementsEquals([1, 2, 3], v0);

    goog.vec.Vec3.setFromArray(v1, v0);
    goog.vec.Vec3.scale(v1, 5, v1);
    assertElementsEquals([5, 10, 15], v1);
  }

  function testMagnitudeSquared() {
    var v0 = goog.vec.Vec3.createFloat32FromArray([1, 2, 3]);
    assertEquals(14, goog.vec.Vec3.magnitudeSquared(v0));
  }

  function testMagnitude() {
    var v0 = goog.vec.Vec3.createFloat32FromArray([1, 2, 3]);
    assertEquals(Math.sqrt(14), goog.vec.Vec3.magnitude(v0));
  }

  function testNormalize() {
    var v0 = goog.vec.Vec3.createFloat32FromArray([2, 3, 4]);
    var v1 = goog.vec.Vec3.create();
    var v2 = goog.vec.Vec3.create();
    goog.vec.Vec3.scale(
        v0, 1 / goog.vec.Vec3.magnitude(v0), v2);

    goog.vec.Vec3.normalize(v0, v1);
    assertElementsEquals(v2, v1);
    assertElementsEquals([2, 3, 4], v0);

    goog.vec.Vec3.setFromArray(v1, v0);
    goog.vec.Vec3.normalize(v1, v1);
    assertElementsEquals(v2, v1);
  }

  function testDot() {
    var v0 = goog.vec.Vec3.createFloat32FromArray([1, 2, 3]);
    var v1 = goog.vec.Vec3.createFloat32FromArray([4, 5, 6]);
    assertEquals(32, goog.vec.Vec3.dot(v0, v1));
    assertEquals(32, goog.vec.Vec3.dot(v1, v0));
  }

  function testCross() {
    var v0 = goog.vec.Vec3.createFloat32FromArray([1, 2, 3]);
    var v1 = goog.vec.Vec3.createFloat32FromArray([4, 5, 6]);
    var crossVec = goog.vec.Vec3.create();

    goog.vec.Vec3.cross(v0, v1, crossVec);
    assertElementsEquals([1, 2, 3], v0);
    assertElementsEquals([4, 5, 6], v1);
    assertElementsEquals([-3, 6, -3], crossVec);

    goog.vec.Vec3.setFromArray(crossVec, v1);
    goog.vec.Vec3.cross(crossVec, v0, crossVec);
    assertElementsEquals([1, 2, 3], v0);
    assertElementsEquals([4, 5, 6], v1);
    assertElementsEquals([3, -6, 3], crossVec);

    goog.vec.Vec3.cross(v0, v0, v0);
    assertElementsEquals([0, 0, 0], v0);
  }

  function testDistanceSquared() {
    var v0 = goog.vec.Vec3.createFloat32FromValues(1, 2, 3);
    var v1 = goog.vec.Vec3.createFloat32FromValues(1, 2, 3);
    assertEquals(0, goog.vec.Vec3.distanceSquared(v0, v1));
    goog.vec.Vec3.setFromValues(v0, 1, 2, 3);
    goog.vec.Vec3.setFromValues(v1, -1, -2, -1);
    assertEquals(36, goog.vec.Vec3.distanceSquared(v0, v1));
  }

  function testDistance() {
    var v0 = goog.vec.Vec3.createFloat32FromValues(1, 2, 3);
    var v1 = goog.vec.Vec3.createFloat32FromValues(1, 2, 3);
    assertEquals(0, goog.vec.Vec3.distance(v0, v1));
    goog.vec.Vec3.setFromValues(v0, 1, 2, 3);
    goog.vec.Vec3.setFromValues(v1, -1, -2, -1);
    assertEquals(6, goog.vec.Vec3.distance(v0, v1));
  }

  function testDirection() {
    var v0 = goog.vec.Vec3.createFloat32FromValues(1, 2, 3);
    var v1 = goog.vec.Vec3.createFloat32FromValues(1, 2, 3);
    var dirVec = goog.vec.Vec3.createFloat32FromValues(4, 5, 6);
    goog.vec.Vec3.direction(v0, v1, dirVec);
    assertElementsEquals([0, 0, 0], dirVec);
    goog.vec.Vec3.setFromValues(v0, 0, 0, 0);
    goog.vec.Vec3.setFromValues(v1, 1, 0, 0);
    goog.vec.Vec3.direction(v0, v1, dirVec);
    assertElementsEquals([1, 0, 0], dirVec);
    goog.vec.Vec3.setFromValues(v0, 1, 1, 1);
    goog.vec.Vec3.setFromValues(v1, 0, 0, 0);
    goog.vec.Vec3.direction(v0, v1, dirVec);
    assertElementsRoughlyEqual(
        [-0.5773502588272095, -0.5773502588272095, -0.5773502588272095],
        dirVec, goog.vec.EPSILON);
  }

  function testLerp() {
    var v0 = goog.vec.Vec3.createFloat32FromValues(1, 2, 3);
    var v1 = goog.vec.Vec3.createFloat32FromValues(10, 20, 30);
    var v2 = goog.vec.Vec3.cloneFloat32(v0);

    goog.vec.Vec3.lerp(v2, v1, 0, v2);
    assertElementsEquals([1, 2, 3], v2);
    goog.vec.Vec3.lerp(v2, v1, 1, v2);
    assertElementsEquals([10, 20, 30], v2);
    goog.vec.Vec3.lerp(v0, v1, .5, v2);
    assertElementsEquals([5.5, 11, 16.5], v2);
  }

  function testEquals() {
    var v0 = goog.vec.Vec3.createFloat32FromValues(1, 2, 3);
    var v1 = goog.vec.Vec3.cloneFloat32(v0);
    assertElementsEquals(v0, v1);

    v1[0] = 4;
    assertFalse(goog.vec.Vec3.equals(v0, v1));

    v1 = goog.vec.Vec3.cloneFloat32(v0);
    v1[1] = 4;
    assertFalse(goog.vec.Vec3.equals(v0, v1));

    v1 = goog.vec.Vec3.cloneFloat32(v0);
    v1[2] = 4;
    assertFalse(goog.vec.Vec3.equals(v0, v1));
  }

</script>
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